Hello,
If your SSC registration form still shows your old address, it generally does not create a major problem as long as your personal details like name, date of birth, and parents’ information are correct. The address is mainly for communication purposes. However, to avoid any issues with certificates or future correspondence, you should immediately inform your school or the SSC board office about the change and submit the official address proof. They can update your record or attach a note so that your certificates reflect the correct address.
Hope this helps you.